1. Referral Center for Sickle Cell Disease, Department of Pediatric Imaging (S.V., C.O., I.C., S.B., A.K., A.N., H.O., A.T., A.S., N.B., M.E., M.A.), Robert-Debre Hospital, AP-HP, Nord, Paris University, France.
2. Department of Pediatrics (G.I.), Robert-Debre Hospital, AP-HP, Nord, Paris University, France.
3. Referral Center for Sickle Cell Disease, Department of Clinical Research, Intercommunal Creteil Hospital, France (F.B.).